I installed Content Server and ensured that both repo and docbroker are running properly.
Then I extracted the ZIP of the Copmoser DCTM_Composer_R.6.7.1120.0095, and replaced dfc.properties file in DCTM_Composer_R.6.7.1120.0095\Composer\plugins\com.emc.ide.external.dfc_1.0.0\documentum.config with the setting in the dfc.properties file in Content Server, but getiing following error:

What could be the reason behind this?